Crepe rubber boot



P 1933- E. ISAKSSON ET AL 1,926,625

CREPE RUBBER BOOT Filed Nov. 18, 1951 Patented Sept. I

5013121 RUBBER poorh Edvin IsakssonpEmilBernhard isakssom and" I MartinAlexander Paulsson, Torekov, Sweden. 'iAppl i cationjNovember 18,'19i31,'SerialNo.515,9?4

anainswwen a This invention relates to an improved rubber boot and hasfor its'main object to provide a boot made entirely fromcreperubber,which is extremely strong and lasting, inxepensive .to man-' 5 ufactureand perfectly water-proof and for these and other good reasons highlyuseful as, a working-boot for labourers, workmen, huntsmen,

Woodmen, fishermen, military 'men etc;

Another object of the invention is ;to provide I 10 a boot which isboth-water-proof and fire-proof and highly useful asa working-boot forworkmen in iron-works; foundries and the like for protecting the footand leg of the wearer against sprinkling molten metal, escaping steametc.

and durable working-boot which is light and comfor-table to the wearerand easy to pull on andoff.

The invention consists in the improved crepe 2Q rubber boot and themodification thereof herein after described, reference being had to theaccompanying drawing in which:-

Figure 1 is a side elevation partially in section, of the improvedcreperubber boot. r

Figure 2 is a plan view of a piece of crepe rubber sheeting cut to formthe leg and a central part of the foot portion of the boot.

Figures 3 and 4 are plan views of pieces of crepe rubber sheeting cut toform sides parts and a counter piece of the foot portion of the boot re.

spectively.

Figure 5 is a plan view of. the insole and'the',

outer sole of the boot, which likewise are'cut from a sheet of creperubber..

Fig. 6 is a side elevation,-partially insection, of a modifiedconstruction of the improved workingboot, wherein theleg and footportions of the boot are coated with a fire-proof asbestos fabricsolutioned to the crepe rubber sheeting. 7

Like numerals refer to like parts throughout the several views of thedrawing.

According to the invention the boot is made en-v tirely of crepe rubbersheeting, the severalparts, including the leg and foot portions as wellas the soles and rand and heel pieces, being cut't o the appropriateform from commercial sheets of crepe rubber, which may be of differentthickness for the leg and foot portions on the one side and the sole andheel portions on the other side, if desired. The leg portion 1 iscutfrom a commercial sheet of crepe rubber substantially to the formillustrated in Fig. 2, i. e. the leg portion proper iscut integral witha tongue l 'adaptedto form an [upper or central part of the 'footportion of the boot, the foot portion of the boot being completed byside parts '7 and 8 and adjoining counter piece 9; the parts 7, 8 andQbeing also cut substan-' commercial crepe rubber sheeting.

Another object of they invention is to provide a relatively cheap,perfectly water-proof, strong tially. to the forms illustrated in Figs.3 and 4 from- The bottom of the boot comprises an insole 3,130 a welt orrand 6, an outer sole 2' and, if desired, any suitable number of furtherouter-or wearing soles 4, as well as a heel 5, alllof theseparts alsobeing cut from commercial crepe rubber sheeting, The crepe rubber isunvulcanizable and no vulcanization is used in forming or attaching theseveral parts of the bootto each other;. all of the said parts beingas'sembledupon a last and gattached. to" each other'by means of anadhesive,

'preferably'asolution prepared from waste crepe I0 rubber dissolvedin asuitable solvent such as benzole', or in anyother well-known manner, for

instance by frictionally heating the edges-of the cut rubber sheetingsso that they will stick to I gether when pressed "against each other-The meeting or adjoiningedges of theseveral leg and r.

' foot portions are bevelled as at l-l and secured to each other inoverlapping position Ifcrepe rubber sheets cannotabe obtained havingsufiicient width for allowing theleg portion 1 to be cut in one, piecea' gore or strip cut to an T appropriate form can be let in at the backof the leg portion ofthe boot as will, be understood."

' The boot made fromcreperubber sheetings'in thicknesses from say 'twoto five millimetres inthis waywill be relatively cheap and entirelypractical, strong, durable and comfortable to the wearer. Further itwillbe perfectly water-proof,

and there will be no tendency forthe joints to split or burstbecause'all of the jointsltake'such positions as-not to be obstructiveto -the flexure of the relatively thick. andstiffj, material, whichfiexure especiallyitakes place at the-transition 7 between the front of.the legportion and the up. per part of the foot portion of thebootjwhenin use. Furtherthroughthe manner in which-the 7 leg andfoot'portions are cut out th relatively,

thick and stiff material will follow the foot" of the wearer withoutwrinkling or crumpling'. f

talcous powder as at'12 (Fig. 1). 'Sucha coating has been found topossess very good -antifrictionproperties-and at thelsame timetobe verydurable and not-to come off on'the dress of'the 110.

wearer. j A

. In order to make the boot easy. to pull onand f. off: theinsideespecially of the lower part ..of the leg portion may be coated with amixture of] .a suitable adhesive solution suchasxlatex and a 1. 1

manner as that described with reference to Figs.

outside of the leg and foot portions of the boot a a inw n r the bottomof the boot, if desired.

1 to 5 inclusively, is provided with an external coating 13' of a thinasbestos fabric solutioned to In this manner a the crepe rubbersheeting. boot is. obtained which is fire-proof, heat-resistant andwatereproofand is very useful as a working-boot for workmen iniron-Works, foundries etc. The asbestos fabric extends over the entireand an asbestos sole may also be What we claim and desireito secure.-by: Letters Patent is:--

A boot comprisinga leg portion'provided at the 7 lower end on the frontside with a centrally arranged tongue forming the central portion of theg 3 vamp and with extensions on opposite sides of and spaced'from themajor rear portion of the said vamp tongue; side pieces for the uppershaped v attheir inner edges to correspond with the sides and front ofthe vampftongue and at their outer edges to correspond with the contourof the front portion of the sole, and a-counter piece united to the saidextensions of the'leg, the front portions of the said upper side membersbeing united together, the inner edges of said upper side members beingunited to the said Vamp tongue and the rear edges of said upper sidemembers being i united to the front portions of-said extensions of the.leg and also to, thefront end portions of the counter piece;

v EDVIN rsAKssoN.

BERNI-IARD IVSAKSSON. MARTIN ALEXANDER PAULSSON.

